*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#0d9488;--secondary:#14b8a6;
  --bg:#0f0f14;--bg-surface:#18181f;--bg-card:#1e1e28;
  --border:rgba(255,255,255,.08);--border-hover:rgba(13,148,136,.35);
  --text:#e8e8f0;--text-muted:#8888a8;--text-faint:#555570;
  --radius-sm:8px;--radius-md:14px;--radius-lg:20px;
  --transition:.2s cubic-bezier(.4,0,.2,1)
}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
svg{display:block}

/* ── HEADER ── */
.site-header{position:sticky;top:0;z-index:100;background:rgba(15,15,20,.9);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;gap:24px;height:64px;width:100%;max-width:1280px;margin-inline:auto;padding-inline:clamp(16px,4vw,48px)}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:36px;height:36px}
.logo-text{font-size:1.1rem;font-weight:700;background:linear-gradient(135deg,#fff 40%,var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{padding:6px 14px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:500;color:var(--text-muted);transition:all var(--transition)}
.nav-link:hover,.nav-link.active{color:var(--text);background:rgba(255,255,255,.06)}

.main-wrap{width:100%;max-width:1280px;margin-inline:auto;padding:clamp(16px,2.5vw,36px) clamp(16px,4vw,48px) clamp(40px,6vw,80px)}

/* ── HERO ── */
.tool-hero{text-align:center;padding:clamp(14px,2.5vw,32px) 0 clamp(18px,2.5vw,28px)}
.tool-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 14px;border-radius:999px;font-size:.75rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;background:rgba(13,148,136,.1);border:1px solid rgba(13,148,136,.25);color:#5eead4;margin-bottom:14px}
.tool-title{font-size:clamp(2rem,5vw,3rem);font-weight:900;letter-spacing:-.04em;line-height:1.1;margin-bottom:8px}
.gradient-title{background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.tool-subtitle{font-size:clamp(.9rem,2vw,1.05rem);color:var(--text-muted);max-width:640px;margin:0 auto}

.ad-slot{background:rgba(255,255,255,.02);border:1px dashed rgba(255,255,255,.07);border-radius:var(--radius-md);min-height:90px;display:flex;align-items:center;justify-content:center;color:var(--text-faint);font-size:.75rem;overflow:hidden}

/* ── DROP ZONE ── */
.drop-zone{border:2px dashed var(--border);border-radius:var(--radius-lg);padding:clamp(48px,7vw,88px) 24px;text-align:center;transition:all var(--transition);cursor:pointer;background:var(--bg-card);position:relative}
.drop-zone:hover,.drop-zone.dragging{border-color:var(--primary);background:rgba(13,148,136,.04)}
.drop-zone input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}
.drop-icon{width:56px;height:56px;margin:0 auto 18px;color:var(--text-faint)}
.drop-title{font-size:1.05rem;font-weight:700;margin-bottom:6px}
.drop-sub{font-size:.84rem;color:var(--text-faint)}
.drop-badges{display:flex;justify-content:center;gap:8px;margin-top:14px;flex-wrap:wrap}
.fmt-badge{padding:3px 10px;border-radius:999px;font-size:.72rem;font-weight:700;border:1px solid var(--border);color:var(--text-faint)}
.fmt-badge.out{border-color:rgba(13,148,136,.3);color:#5eead4;background:rgba(13,148,136,.08)}

/* ── FORMAT SELECTOR ── */
.format-selector{display:flex;gap:0;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;margin-top:20px}
.fmt-btn{flex:1;padding:12px 8px;font-size:.82rem;font-weight:700;color:var(--text-faint);border-right:1px solid var(--border);transition:all var(--transition);display:flex;flex-direction:column;align-items:center;gap:4px}
.fmt-btn:last-child{border-right:none}
.fmt-btn.active{background:var(--primary);color:#fff}
.fmt-btn:hover:not(.active){background:rgba(13,148,136,.08);color:var(--text)}
.fmt-btn .fmt-ext{font-size:1rem;font-weight:900}
.fmt-btn .fmt-desc{font-size:.62rem;opacity:.8;text-align:center}

/* ── SETTINGS PANEL ── */
.settings-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;margin-top:12px}
.setting-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:14px 16px}
.setting-label{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint);margin-bottom:8px;display:flex;align-items:center;justify-content:space-between}
.setting-label span{color:var(--primary);font-weight:700}
.range-slider{width:100%;accent-color:var(--primary);cursor:pointer}
.range-hints{display:flex;justify-content:space-between;font-size:.67rem;color:var(--text-faint);margin-top:3px}
.color-row{display:flex;align-items:center;gap:8px}
.color-swatch{width:32px;height:32px;border-radius:var(--radius-sm);border:1px solid var(--border);cursor:pointer;padding:2px}
.color-hex{flex:1;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 10px;color:var(--text);font-family:'Fira Code',monospace;font-size:.82rem;outline:none;transition:border-color var(--transition)}
.color-hex:focus{border-color:var(--primary)}

/* ── STATS STRIP ── */
.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px}
@media(max-width:600px){.stats-strip{grid-template-columns:1fr 1fr}}
.stat-box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 12px;text-align:center}
.stat-val{font-size:1.1rem;font-weight:800;color:var(--primary);line-height:1;margin-bottom:3px}
.stat-val.green{color:#34d399}
.stat-val.red{color:#f87171}
.stat-lbl{font-size:.63rem;color:var(--text-faint);text-transform:uppercase;letter-spacing:.05em}

/* ── ACTION BAR ── */
.action-bar{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.btn-primary{display:inline-flex;align-items:center;gap:7px;padding:11px 22px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:700;background:var(--primary);color:#fff;border:none;transition:all var(--transition)}
.btn-primary:hover{background:var(--secondary)}
.btn-primary:disabled{opacity:.4;cursor:not-allowed}
.btn-primary svg{width:16px;height:16px}
.btn-outline{display:inline-flex;align-items:center;gap:7px;padding:10px 18px;border-radius:var(--radius-sm);font-size:.85rem;font-weight:700;color:var(--text-muted);border:1.5px solid var(--border);transition:all var(--transition)}
.btn-outline:hover{border-color:var(--border-hover);color:var(--text)}
.btn-outline:disabled{opacity:.4;cursor:not-allowed}
.btn-outline svg{width:14px;height:14px}

/* ── FILE LIST ── */
.file-list{display:flex;flex-direction:column;gap:8px;margin-top:16px}
.file-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);display:grid;grid-template-columns:48px 1fr auto auto;gap:10px;align-items:center;padding:10px 14px;transition:border-color var(--transition)}
.file-item.done{border-color:rgba(13,148,136,.25)}
.file-item.error{border-color:rgba(248,113,113,.25)}
.file-thumb{width:48px;height:48px;border-radius:var(--radius-sm);object-fit:cover;background:var(--bg-surface);flex-shrink:0}
.file-thumb-placeholder{width:48px;height:48px;border-radius:var(--radius-sm);background:var(--bg-surface);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--text-faint)}
.file-info{}
.file-name{font-size:.83rem;font-weight:600;margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:280px}
.file-meta{font-size:.72rem;color:var(--text-faint)}
.file-saving{font-size:.75rem;font-weight:700;padding:2px 8px;border-radius:999px;white-space:nowrap}
.saving-green{background:rgba(52,211,153,.1);color:#34d399}
.saving-yellow{background:rgba(251,191,36,.1);color:#fbbf24}
.saving-red{background:rgba(248,113,113,.1);color:#f87171}
.saving-spin{background:rgba(255,255,255,.06);color:var(--text-faint)}
.btn-dl-sm{padding:5px 12px;border-radius:var(--radius-sm);font-size:.73rem;font-weight:700;background:var(--primary);color:#fff;border:none;cursor:pointer;transition:opacity var(--transition);white-space:nowrap}
.btn-dl-sm:hover{opacity:.85}
.btn-dl-sm:disabled{opacity:.35;cursor:not-allowed}

/* ── PROGRESS ── */
.progress-wrap{margin-top:8px}
.progress-label{font-size:.78rem;color:var(--text-muted);margin-bottom:4px}
.progress-bar{height:5px;background:var(--bg-surface);border-radius:3px;overflow:hidden;border:1px solid var(--border)}
.progress-fill{height:100%;background:var(--primary);border-radius:3px;transition:width .3s}

/* ── COMPARE SLIDER (single) ── */
.compare-wrap{position:relative;overflow:hidden;border-radius:var(--radius-lg);border:1px solid var(--border);background:repeating-conic-gradient(rgba(255,255,255,.04) 0% 25%,transparent 0% 50%) 0 0/20px 20px;cursor:col-resize;touch-action:none;line-height:0;margin-top:16px}
.compare-base{display:block;width:100%;height:auto;max-height:440px;object-fit:contain;pointer-events:none}
.compare-overlay{position:absolute;inset:0;pointer-events:none}
.compare-img{display:block;width:100%;height:100%;max-height:440px;object-fit:contain;pointer-events:none;position:absolute;top:0;left:0}
.compare-line{position:absolute;top:0;bottom:0;width:3px;background:rgba(255,255,255,.9);box-shadow:0 0 8px rgba(0,0,0,.5);transform:translateX(-50%);pointer-events:none;display:flex;align-items:center;justify-content:center}
.compare-handle{width:42px;height:42px;border-radius:50%;background:rgba(255,255,255,.95);box-shadow:0 2px 12px rgba(0,0,0,.35);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#1a1a2e;pointer-events:none;transition:transform .1s}
.compare-wrap:active .compare-handle,.compare-wrap.dragging .compare-handle{transform:scale(1.1)}
.compare-label{position:absolute;top:10px;padding:2px 9px;border-radius:999px;font-size:.67rem;font-weight:800;letter-spacing:.07em;text-transform:uppercase;pointer-events:none;background:rgba(0,0,0,.55);backdrop-filter:blur(4px);color:#fff}
.compare-label-l{left:10px}
.compare-label-r{right:10px}
.compare-range{width:100%;margin-top:8px;accent-color:var(--primary);cursor:pointer}

/* ── SECTIONS ── */
.page-section{margin-top:clamp(32px,5vw,56px)}
.section-title{font-size:clamp(1.2rem,2.5vw,1.7rem);font-weight:800;letter-spacing:-.03em;margin-bottom:8px}
.section-desc{color:var(--text-muted);font-size:.9rem;margin-bottom:24px}
.section-divider{border:none;border-top:1px solid var(--border);margin:clamp(24px,4vw,44px) 0}

.steps-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.step-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px}
.step-num{width:32px;height:32px;border-radius:50%;background:rgba(13,148,136,.15);color:var(--primary);font-size:.9rem;font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.step-title{font-size:.93rem;font-weight:700;margin-bottom:6px}
.step-desc{font-size:.82rem;color:var(--text-muted);line-height:1.6}

.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:18px}
.feature-icon{font-size:1.4rem;margin-bottom:10px}
.feature-title{font-size:.88rem;font-weight:700;margin-bottom:5px}
.feature-desc{font-size:.78rem;color:var(--text-muted);line-height:1.5}

.format-table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius-md);margin:20px 0}
.format-table{width:100%;border-collapse:collapse;font-size:.85rem}
.format-table th{background:rgba(255,255,255,.04);padding:10px 14px;text-align:left;font-size:.73rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-faint);border-bottom:1px solid var(--border)}
.format-table td{padding:10px 14px;border-bottom:1px solid rgba(255,255,255,.04);color:var(--text-muted);vertical-align:middle}
.format-table tr:last-child td{border-bottom:none}
.format-table tr:hover td{background:rgba(255,255,255,.02)}
.td-yes{color:#34d399;font-weight:700}
.td-no{color:#f87171;font-weight:700}
.td-part{color:#fbbf24;font-weight:700}

.faq-list{display:flex;flex-direction:column;gap:8px}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.faq-q{display:flex;align-items:center;justify-content:space-between;width:100%;padding:14px 18px;font-size:.9rem;font-weight:600;color:var(--text);text-align:left;gap:12px}
.faq-q:hover{color:var(--primary)}
.faq-icon{font-size:1.2rem;color:var(--text-faint);flex-shrink:0;transition:transform var(--transition)}
.faq-a{display:none;padding:0 18px 16px;font-size:.85rem;color:var(--text-muted);line-height:1.7}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--primary)}

.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.related-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:16px;display:flex;flex-direction:column;gap:8px;transition:all var(--transition)}
.related-card:hover{border-color:var(--border-hover);transform:translateY(-2px)}
.related-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.related-icon svg{width:20px;height:20px;color:#fff}
.related-name{font-size:.88rem;font-weight:700}
.related-desc{font-size:.78rem;color:var(--text-muted);line-height:1.4;flex:1}
.related-link{font-size:.78rem;color:var(--primary);font-weight:600}

.site-footer{background:var(--bg-surface);border-top:1px solid var(--border);margin-top:64px;padding-top:40px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:40px;width:100%;max-width:1280px;margin-inline:auto;padding-inline:clamp(16px,4vw,48px);padding-bottom:40px}
.footer-heading{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);margin-bottom:10px}
.footer-links{display:flex;flex-direction:column;gap:7px}
.footer-links a{font-size:.85rem;color:var(--text-muted);transition:color var(--transition)}
.footer-links a:hover{color:var(--text)}
.footer-brand-text{font-size:.82rem;color:var(--text-faint);margin-top:10px;line-height:1.5}
.footer-bottom{border-top:1px solid var(--border);padding:18px clamp(16px,4vw,48px);width:100%;max-width:1280px;margin-inline:auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:.78rem;color:var(--text-faint)}

.toast{position:fixed;bottom:24px;right:24px;background:#1e1e28;border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 20px;font-size:.85rem;font-weight:600;color:var(--text);box-shadow:0 8px 32px rgba(0,0,0,.4);transform:translateY(80px);opacity:0;transition:all .3s;z-index:1000;pointer-events:none}
.toast.show{transform:translateY(0);opacity:1}

@media(max-width:768px){.main-nav{display:none}.footer-grid{grid-template-columns:1fr}.file-name{max-width:160px}}